Pen



FIG. 1 is a front view of the pen showing our new design;

FIG. 2 is a rear view of the pen shown in FIG. 1;

FIG. 3 is a left side view of the pen shown in FIG. 1 and the right sideview is a mirror image of FIG. 3;

FIG. 4 is a top plan view of the pen shown in FIG. 1; and,

FIG. 5 is a bottom plan view of the pen shown in FIG. 1.

We claim the ornamental design for the pen, as shown and described.